Method for quantitatively detecting naphthenic sulfonate components and residual oil sulfonate components in petroleum production liquid

A technology of naphthenic sulfonate and alkylsulfonate is applied in the field of quantitative detection of naphthenic sulfonate components and residual oil sulfonate components in petroleum production fluid, and can solve the problem that the sulfonic acid cannot be accurately detected. acid, etc.

Active Publication Date: 2021-04-23
PETROCHINA CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for quantitatively detecting naphthene sulfonate components and residual oil sulfonate components in petrole

Method used

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  • Method for quantitatively detecting naphthenic sulfonate components and residual oil sulfonate components in petroleum production liquid
  • Method for quantitatively detecting naphthenic sulfonate components and residual oil sulfonate components in petroleum production liquid
  • Method for quantitatively detecting naphthenic sulfonate components and residual oil sulfonate components in petroleum production liquid

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Experimental program
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Effect test

Embodiment 1

[0094] (1) Preparation of naphthene sulfonate standard mixture

[0095] ①Weigh 50g of naphthenic sulfonate (the product obtained by sulfonation of naphthenic crude oil) and fully dissolve it in 600ml of hot absolute ethanol (60°C) on a water bath, wash with 80ml of hot absolute ethanol, collect and wash Clear liquid, remove absolute ethanol at 110°C to obtain a sulfonate system without asphaltenes and inorganic salts (ie, the first naphthenic sulfonate);

[0096] ②Add 30g of the above sulfonate system to 400ml of isopropanol / water (1:1 volume ratio) to fully dissolve in a water bath at 60°C. When the temperature of the solution drops to 30°C, transfer the solution to a 1000ml separating funnel In, extract repeatedly (4 times) with 400ml n-hexane, until the upper phase is slightly yellow;

[0097] ③ Collect the aqueous phase of isopropanol and dry it in an oven at 110°C to constant weight to obtain the standard mixture of naphthene sulfonates.

[0098] (2) Preparation of resi...

Embodiment 2

[0124] (1) according to the method described in embodiment 1, preparation concentration is the naphthene sulfonate test sample of 100mg / L, under the liquid chromatography-mass spectrometry analysis condition in above-mentioned embodiment 1, this sample Injection analysis, get spectrum. The naphthene sulfonate sample spectrogram that obtains, according to the naphthene sulfonate standard curve that embodiment 1 establishes, obtains its concentration detection result.

[0125] The above samples were repeated 6 times under the same conditions, and the results are shown in Table 1.

[0126] Table 1: Repeatability test results of 100mg / L naphthene sulfonate samples

[0127]

[0128](2) according to the method described in embodiment 1, preparation concentration is the residual oil sulfonate test sample of 250mg / L, under the liquid chromatography-mass spectrometry analysis condition in above-mentioned embodiment 1, this sample is carried out Analyze the sample and get the spect...

Embodiment 3

[0134] In this embodiment, the measurement parameter of sample addition recovery rate is used to determine and evaluate the accuracy of the analytical method and measurement system of the present invention.

[0135] The same sample (this sample has contained naphthene sulfonate and residual oil sulfonate) is taken in two parts: one of them is added with quantitative standard substance (i.e. two kinds of sulfonates) to obtain the spiked sample; No standard substance was added to the sample, which was an unspiked sample.

[0136] A total of 5 groups of samples were configured, which involved different concentration combinations. The “actual spiked concentration” of the spiked samples in each group is shown in Table 3. Specifically, in sample group 1, 55 mg / L naphthene sulfonate and 50 mg / L residue sulfonate were added to the spiked sample; Alkane sulfonate and 12.5 mg / L residual oil sulfonate; in sample group 3, 25 mg / L naphthene sulfonate and 50 mg / L residual oil sulfonate we...

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Abstract

The invention relates to a method for quantitatively detecting naphthenic sulfonate components and residual oil sulfonate components in petroleum production liquid. The method comprises the following steps: establishing a first standard curve of naphthenic sulfonate content and a second standard curve of residual oil sulfonate content by adopting a liquid chromatography-mass spectrometry method; by adopting the liquid chromatography-mass spectrometry method, obtaining a spectrogram of a naphthenic sulfonate component and a residual oil sulfonate component in the petroleum production liquid; and according to the first standard curve and the spectrogram, obtaining the content of the naphthenic sulfonate component in the petroleum production liquid, and according to the second standard curve and the spectrogram, obtaining the content of the residual oil sulfonate component in the petroleum production liquid. The method provided by the invention can be used for accurately and quantitatively detecting the contents of the two petroleum sulfonate surfactants in the petroleum production liquid.

Description

technical field [0001] The invention relates to the technical field of oil field chemical flooding surfactant content detection, in particular to a method for quantitatively detecting naphthene sulfonate components and residual oil sulfonate components in oil production fluid. Background technique [0002] Chemical flooding has achieved remarkable oil-increasing and water-reducing effects in field tests, and has become an important technology for enhancing oil recovery and has been widely used. For surfactant flooding, the performance of reducing interfacial tension between oil and water is mainly used to achieve the purpose of enhancing oil recovery. [0003] Surfactants play a key role in chemical flooding to enhance oil recovery. Surfactants for oil flooding often require one or several surfactants to be compounded to obtain a surfactant product with excellent performance. Sulfonate surfactants are currently the largest and most common class of anionic surfactants, so th...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/72
CPCG01N30/02G01N30/06G01N30/72
Inventor 关丹栾和鑫白雷阙庭丽陈权生唐文洁邵洪志云庆庆
Owner PETROCHINA CO LTD
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